Constantino, Leticia S. <br/><br/>Pilipinas Kong Mahal: Ikaanim na Baitang  Kasaysayan, Heograpiya, Kultura  -- Quezon City, Philippines:  Abiva Publishing House, Inc.,  1988. <br/><br/><label>ISBN: </label>971116275x <br/><br/><label>Dewey Class. No.: </label>GSL TB 910 C766 1988